Check test exit code for failure

Former-commit-id: 01670e9948a975fd04ee8db996e45ce357caed85

tests/tcpdump/test_script.sh

@@ -15,7 +15,11 @@ TEST_DIR=$PEASOUP_HOME/tests/tcpdump
 
 # debugging
 strace $2 -n -r $TEST_DIR/tcpd_tests/bgp_vpn_attrset.pcap -t -v
-report_success
+if [ $? -eq 0 ]; then
+	report_success
+else
+	report_failure 
+fi
 
 run_basic_test 20 -h
 run_basic_test 20 -$i -s0 -nr $TEST_DIR/tcpd_tests/print-flags.pcap